CN211304353U - Cold frock of beating of external splines - Google Patents
Cold frock of beating of external splines Download PDFInfo
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- CN211304353U CN211304353U CN201921944381.3U CN201921944381U CN211304353U CN 211304353 U CN211304353 U CN 211304353U CN 201921944381 U CN201921944381 U CN 201921944381U CN 211304353 U CN211304353 U CN 211304353U
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Abstract
The utility model provides an external spline cold forging tool, which comprises a tool rotating shaft, a fixed sleeve, a locking block, a copper sleeve and a cold forging wheel; the fixed sleeves are fixed on the translation mechanism, and the tool rotating shaft can axially rotate in the two fixed sleeves; a groove is formed in the tool rotating shaft, and the copper sleeve is fastened on the cylindrical surface of the groove through threads; the wheel is installed in the recess to the cold, installs detachable latch segment on two fixed sleeves respectively, and the inner wall shape of latch segment matches with the axial region phase-match of the wheel is beaten to the cold for the cold wheel of beating can be followed the face of cylinder of constituteing by fixed sleeve inboard step inner wall and latch segment inner wall and rotated. The external spline cold forging tool is used on two sides of a workpiece simultaneously, the symmetrical stress application in the torsion bar cold forging process can be realized, the diameter direction of the torsion bar is uniformly stressed, and meanwhile, the integral cold forging wheel is adopted, so that the processing surface quality and the spline precision can be greatly improved; simultaneously, compare processing methods such as traditional milling, can shorten process time by a wide margin, promote machining efficiency.
Description
Technical Field
The utility model belongs to the technical field of machining, concretely relates to frock is beaten to external splines cold.
Background
The torsion bar is made of a low-alloy ultrahigh-strength steel 45CrNiMoVA material, and a common method for machining the external splines of the part is to design corresponding external spline hobs for milling, so that the method is long in machining time, fast in tool abrasion, poor in product quality consistency, high in cost and low in benefit when the part is machined in large batches, and machining precision of the spline parts is reduced along with tool abrasion. Therefore, the external spline cold-forging tool for the precise cold extrusion molding of the external spline of the torsion bar is required to be provided for the processing of the external spline of the torsion bar, so that the rapid processing molding of the external spline of the torsion bar is realized, the processing precision of the spline is ensured, and the product quality is ensured.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model provides a frock is beaten to external splines to solve the technical problem that torsion bar external splines machining cycle is long, inefficiency, quality uniformity is poor.
(II) technical scheme
In order to solve the technical problem, the utility model provides an external spline cold forging tool, which comprises a tool rotating shaft, a fixed sleeve, a locking block, a copper sleeve and a cold forging wheel; the fixture rotating shaft can axially rotate in the fixed sleeve; a groove is formed in the position, between the two fixing sleeves, of the tool rotating shaft, and the arc-shaped copper sleeve is fastened on the cylindrical surface of the groove through threads; the cold forging wheel is arranged in the groove and is contacted with the inner wall of the copper sleeve, and the end surfaces of the cold forging wheel are respectively in clearance fit with the upper end surface and the lower end surface of the groove; the two fixing sleeves are respectively provided with a detachable locking block, and the inner wall shape of the locking block is matched with the shaft part of the cold beating wheel, so that the cold beating wheel can rotate along the cylindrical surface formed by the inner side step inner wall of the fixing sleeve and the inner wall of the locking block.
Further, the cold forging wheel is in an integrated design.
Further, the cold forging wheel is made of Cr12MoV tool steel, is subjected to heat treatment, has the hardness of HRC 58-63, and has a polished tooth surface.
Furthermore, the curve of the cold forging wheel is consistent with that of a part to be processed, the curve of the cold forging wheel is prolonged along the direction of an involute, and the reference runout is not more than 0.005 mm; the runout of the cold forging wheel shaft part to the reference is not more than 0.005 mm.
(III) advantageous effects
The utility model provides an external spline cold forging tool, which comprises a tool rotating shaft, a fixed sleeve, a locking block, a copper sleeve and a cold forging wheel; the fixed sleeves are fixed on a translation mechanism of the equipment, and the tool rotating shaft can axially rotate in the two fixed sleeves; a groove is formed in the position, between the two fixing sleeves, of the tool rotating shaft, and the arc-shaped copper sleeve is fastened on the cylindrical surface of the groove through threads; the cold forging wheel is arranged in the groove and is contacted with the inner wall of the copper sleeve, and the end surfaces of the cold forging wheel are respectively in clearance fit with the upper end surface and the lower end surface of the groove; the two fixing sleeves are respectively provided with a detachable locking block, and the inner wall shape of the locking block is matched with the shaft part of the cold beating wheel, so that the cold beating wheel can rotate along the cylindrical surface formed by the inner side step inner wall of the fixing sleeve and the inner wall of the locking block.
The external spline cold forging tool is used on two sides of a workpiece simultaneously, the symmetrical stress application in the torsion bar cold forging process can be realized, the diameter direction of the torsion bar is uniformly stressed, and meanwhile, the integral cold forging wheel is adopted, so that the processing surface quality and the spline precision can be greatly improved; simultaneously, compare processing methods such as traditional milling, can shorten process time by a wide margin, promote machining efficiency.
Drawings
FIG. 1 is a schematic structural view of an external spline cold forging tool according to an embodiment of the present invention;
fig. 2 is the utility model discloses external splines cold forging method principle sketch: (a) top view, (b) side view.
Detailed Description
In order to make the objects, contents and advantages of the present invention clearer, the following description will make a detailed description of embodiments of the present invention with reference to the accompanying drawings and examples.
The embodiment provides an external spline cold forging tool, the structure of which is shown in fig. 1 and mainly comprises a tool rotating shaft 1, a fixing sleeve 2, a locking block 3, a copper sleeve 4 and a cold forging wheel 5. Wherein, fixed sleeve 2 is fixed on the translation mechanism of equipment, and two fixed sleeve 2 overlap respectively and establish the upper and lower both ends at frock pivot 1, and frock pivot 1 can carry out axial rotation in fixed sleeve 2. The part of the tool rotating shaft 1 between the two fixing sleeves 2 is provided with a groove, and the arc-shaped copper sleeve 4 is fastened on the cylindrical surface of the groove through threads. The cold forging wheel 5 is arranged in the groove and is contacted with the inner wall of the copper sleeve 4, and the end surfaces of the cold forging wheel are respectively in clearance fit with the upper end surface and the lower end surface of the groove. Install detachable latch segment 3 on two fixed sleeves 2 respectively, the axial region phase-match of the inner wall shape of latch segment 3 and cold wheel 5 for cold wheel 5 can be followed the face of cylinder that the inner wall of 2 inboard steps of fixed sleeve and the inner wall of latch segment 3 are constituteed and is rotated. The cold forging wheel 5 is integrally designed, Cr12MoV tool steel is adopted, heat treatment is carried out, the hardness is HRC 58-63, and the tooth surface is polished. The curve of the cold forging wheel part is consistent with that of a part to be processed, the cold forging wheel part is prolonged along the direction of an involute, and the reference runout is not more than 0.005 mm; the jumping of the positioning shaft part of the cold beating wheel to the reference is not more than 0.005 mm.
When using, as shown in fig. 2, two cold-forging tooling symmetries of the same structure are installed on two translation mechanisms, tooling rotating shaft 1 is placed vertically, when integral type cold-forging wheel 5 is installed on tooling rotating shaft 1, tooling rotating shaft 1 returns to the initial position, make its recess rotate to the central point of latch segment 3 and put, unload latch segment 3, pack cold-forging wheel 5 into the recess and make the axial region excircle of cold-forging wheel 5 and the contact of 4 inner walls of copper sheathing, the terminal surface respectively with recess up and down terminal surface clearance fit, then pass through the screw fastening with latch segment 3 on fixed sleeve 2. The cold forging wheel 5 can slide along the cylindrical surface formed by the inner wall of the step at the inner side of the fixed sleeve 2 and the inner wall of the locking block 3 after being installed. The fixed sleeve 2 is fixed on the translation mechanism and can horizontally move along with the translation mechanism so as to realize the feed and the discharge.
When cold beating is carried out, the fixed sleeve 2 moves to a feed preparation position along with the translation mechanism, the machine tool control system controls the two tool rotating shafts 1 to rotate, the outer tool rotating shaft 1 rotates anticlockwise, the inner tool rotating shaft 1 rotates clockwise, the cold beating wheel 5 is driven to carry out circular motion when the tool rotating shafts 1 rotate, when the cold beating wheel 5 is close to a workpiece, one beating is carried out, and one beating is carried out when the rotating shafts rotate for 360 degrees; when the cold forging wheel 5 strikes a workpiece once, the main shaft rotates by an angle A (A is 360 DEG/z, and z is the number of the spline teeth) under the control of the control system; meanwhile, the workpiece is axially fed in a minute feed L.
The cold forging forming process technology adopted by the utility model shortens the processing time of the spline end single piece by 80% compared with the traditional milling processing, and the service life of the cold forging wheel single piece is greatly prolonged; during processing, cutting oil is adopted for cooling and lubricating, so that the defect caused by overheating of the surface layer of the part can be effectively avoided
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (4)
1. The external spline cold forging tool is characterized by comprising a tool rotating shaft, a fixed sleeve, a locking block, a copper sleeve and a cold forging wheel; the fixture rotating shaft can axially rotate in the fixed sleeve; a groove is formed in the position, between the two fixing sleeves, of the tool rotating shaft, and the arc-shaped copper sleeve is fastened on the cylindrical surface of the groove through threads; the cold forging wheel is arranged in the groove and is contacted with the inner wall of the copper sleeve, and the end surfaces of the cold forging wheel are respectively in clearance fit with the upper end surface and the lower end surface of the groove; the two fixing sleeves are respectively provided with a detachable locking block, and the inner wall shape of the locking block is matched with the shaft part of the cold beating wheel, so that the cold beating wheel can rotate along the cylindrical surface formed by the inner side step inner wall of the fixing sleeve and the inner wall of the locking block.
2. The cold forging tooling of claim 1, wherein the cold forging wheel is of an integrated design.
3. The cold forging tool set forth in claim 1, wherein the cold forging wheel is made of Cr12MoV tool steel, is subjected to heat treatment, has a hardness of HRC 58-63, and has a polished tooth surface.
4. The cold forging tool according to claim 1, wherein a curve of the cold forging wheel is consistent with a part to be machined, the curve of the cold forging wheel is prolonged along an involute direction, and the reference runout is not more than 0.005 mm; the runout of the cold forging wheel shaft part to the reference is not more than 0.005 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921944381.3U CN211304353U (en) | 2019-11-12 | 2019-11-12 | Cold frock of beating of external splines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921944381.3U CN211304353U (en) | 2019-11-12 | 2019-11-12 | Cold frock of beating of external splines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211304353U true CN211304353U (en) | 2020-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921944381.3U Active CN211304353U (en) | 2019-11-12 | 2019-11-12 | Cold frock of beating of external splines |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110722035A (en) * | 2019-11-12 | 2020-01-24 | 北京北方车辆集团有限公司 | Cold frock of beating of external splines |
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2019
- 2019-11-12 CN CN201921944381.3U patent/CN211304353U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110722035A (en) * | 2019-11-12 | 2020-01-24 | 北京北方车辆集团有限公司 | Cold frock of beating of external splines |
| CN110722035B (en) * | 2019-11-12 | 2024-10-18 | 北京北方车辆集团有限公司 | Cold frock of beating of external spline |
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